DNS servers are getting more smarter each day, the servers now force the browser to cache the request and the cache is stored like a browser cache.This helps the DNS to get resolved quickly however it can become a problem when you are developing your website and change your website server.
The DNS cache stores the IP addresses of the websites that you have recently accessed via your web browser.
However, if you are on a Windows 10 PC or machine or laptop then you can flush(clean) your DNS cache easily by following the given steps: